digitalmars.D.dwt - Ice Breaker

pragma (10/10) Feb 07 2006 Let me be the first (of possibly many) to say: I don't have a clue how t...

Charles (15/25) Feb 07 2006 I've only recently started using it as well.
Sean Kelly (4/14) Feb 07 2006 Aye, same here. I've some experience with Swing and MFC but that's
Deewiant (76/90) Feb 07 2006 Got these from Wikipedia:
nick (3/17) Feb 07 2006 http://www.java2s.com/Code/Java/SWT-JFace-Eclipse/CatalogSWT-JFace-Eclip...
Kris (24/37) Feb 07 2006 http://www-128.ibm.com/developerworks/opensource/library/os-jface1/

pragma (4/26) Feb 07 2006 Thanks! (Thanks to Deewiant as well)
Sean Kelly (4/29) Feb 07 2006 Egads! When I opened this message my desk actually groaned under the

Kris (3/16) Feb 07 2006 Forgot this link for widget examples: http://www.eclipse.org/swt/widgets...

pragma <pragma_member pathlink.com> writes:

Let me be the first (of possibly many) to say: I don't have a clue how to
program with SWT.

With that in mind, could anyone steer me toward a solid tutorial on how to
become familiarized with how SWT is organized?  How about how to do a "Hello
Windows World" application?  Tutorials?  Code comparisons to AWT or other GUI
libs?

I'd love to start talking shop in this subgroup, but I really need to do my
homework first.

Thanks,

- Eric Anderton at yahoo

Feb 07 2006

"Charles" <noone nowhere.com> writes:

I've only recently started using it as well.

http://www.eclipse.org/swt/snippets/

API :
http://help.eclipse.org/help31/nftopic/org.eclipse.platform.doc.isv/referenc
e/api/index.html

The DWT has a nice set of samples also under
dwt/import/current/win32/packages/examples

A bit unnerving is the lack of #swt on freenode, even #d boasts around 20
members at any given time !  #eclipse is usually full and willing to take
swt questions though.




"pragma" <pragma_member pathlink.com> wrote in message
news:dsab9v$280f$1 digitaldaemon.com...
 Let me be the first (of possibly many) to say: I don't have a clue how to
 program with SWT.

 With that in mind, could anyone steer me toward a solid tutorial on how to
 become familiarized with how SWT is organized?  How about how to do a

"Hello
 Windows World" application?  Tutorials?  Code comparisons to AWT or other

GUI
 libs?

 I'd love to start talking shop in this subgroup, but I really need to do

my
 homework first.

 Thanks,

 - Eric Anderton at yahoo

Feb 07 2006

Sean Kelly <sean f4.ca> writes:

pragma wrote:
 Let me be the first (of possibly many) to say: I don't have a clue how to
 program with SWT.
 
 With that in mind, could anyone steer me toward a solid tutorial on how to
 become familiarized with how SWT is organized?  How about how to do a "Hello
 Windows World" application?  Tutorials?  Code comparisons to AWT or other GUI
 libs?
 
 I'd love to start talking shop in this subgroup, but I really need to do my
 homework first.

Aye, same here.  I've some experience with Swing and MFC but that's 
about it in the UI realm.


Sean

Feb 07 2006

Deewiant <deewiant.doesnotlike.spam gmail.com> writes:

pragma wrote:
 Let me be the first (of possibly many) to say: I don't have a clue how to
 program with SWT.
 
 With that in mind, could anyone steer me toward a solid tutorial on how to
 become familiarized with how SWT is organized?  How about how to do a "Hello
 Windows World" application?  Tutorials?  Code comparisons to AWT or other GUI
 libs?
 
 I'd love to start talking shop in this subgroup, but I really need to do my
 homework first.
 
 Thanks,
 
 - Eric Anderton at yahoo

Got these from Wikipedia:

An interactive Flash presentation which seems quite thorough:
http://www.javalobby.org/eps/swt_intro/index.html

Tutorials and examples for SWT with Eclipse:
http://www.cs.umanitoba.ca/~eclipse/

Eclipse doesn't seem to feature much in the actual code examples above, so the
texts should be alright from a D perspective as well. I lifted a "hello, world"
from the first tutorial (on a quick browse it seems as though this is the only
SWT-related code in that one, it's mostly about setting up and using Eclipse):

import org.eclipse.swt.widgets.*;
import org.eclipse.swt.*;
public class SWTHello {
	public static void main(String[] args) {
		Display display = new Display();
		Shell shell = new Shell(display);
		Label label = new Label(shell, SWT.NONE);
		label.setText("Hello, World!");
		shell.pack();
		label.pack();
		shell.open();
		while(!shell.isDisposed())
			if(!display.readAndDispatch())
				display.sleep();
		display.dispose();
		label.dispose();
	}
}

The Javadoc should be able to help you with actually understanding that:
http://help.eclipse.org/help31/nftopic/org.eclipse.platform.doc.isv/reference/api/index.html

I can also offer an explanation of my own, based on same Javadoc, in case you or
someone needs it.

--

Display seems to be a "world manager" type class, taking care of everything.
Even the doc says "Applications which are built with SWT will almost always
require only a single display. In particular, some platforms which SWT supports
will not allow more than one active display."

Shell is what most people would call a window. The constructor binds it to the
Display - nothing special there.

Label "represents a non-selectable user interface object that displays a string
or image". The constructor binds it to the Shell; the second argument is the
style, whose exact effects confused me a bit since, lacking the library, I can't
work with examples, only the doc.

Label.setText() should be clear enough. The pack() methods resize their widgets
to their "preferred size", whose definition I leave to the documentation.

Shell.open() - brings the Shell to the front, makes it visible, gives it
keyboard focus, asks the window manager to make it active. In layman's terms,
opens the window.

isDisposed() could be renamed exists(), it seems. A disposed widget is
completely destroyed and is not to be used. Widgets can be destroyed by the user
closing them or internally.

Display.readAndDispatch() does as it is named: "Reads an event from the
operating system's event queue, dispatches it appropriately, and returns true
if there is potentially more work to do, or false if the caller can sleep until
another event is placed on the event queue." In the program, we then sleep if
the latter is the case, since we don't want to waste CPU cycles in a busy-wait.

Display and Label are then disposed of. Display's dispose method comes from the
Device class and "disposes of the operating system resources associated with the
receiver". Label's comes from the Widget class and "disposes of the operating
system resources associated with the receiver and all its descendents".

--

I think that last bit is pretty interesting. Display doesn't dispose of its
descendants when disposed itself, but a widget does. Personally, I think it
would make most sense for it to be necessary to only dispose of Display at the
end and all would be well, but no.

Also, I think the orders in which some of the methods are called are a bit
strange (this might be due to the example instead of how SWT works, though):

- The Shell is packed before the Label. I suppose the Shell asks it descendants
for their optimal sizes and calculates its own based on that, in which case the
calling order doesn't matter, but it just strikes me as a bit strange.

- The Display is disposed of before the Label - and the Shell isn't disposed of
at all! I presume the latter is an error, because otherwise this would be very
confusing. The Display doesn't dispose of its descendants - it says so right in
the Javadoc. The Label is a descendant of the Shell, not the other way around,
so disposing of the Label leaves the Shell completely free. Smells like a memory
leak if you ask me...

Phew, that was a long post! Hope this helps.

Feb 07 2006

nick <nick.atamas gmail.com> writes:

pragma wrote:
 Let me be the first (of possibly many) to say: I don't have a clue how to
 program with SWT.
 
 With that in mind, could anyone steer me toward a solid tutorial on how to
 become familiarized with how SWT is organized?  How about how to do a "Hello
 Windows World" application?  Tutorials?  Code comparisons to AWT or other GUI
 libs?
 
 I'd love to start talking shop in this subgroup, but I really need to do my
 homework first.
 
 Thanks,
 
 - Eric Anderton at yahoo

http://www.java2s.com/Code/Java/SWT-JFace-Eclipse/CatalogSWT-JFace-Eclipse.htm

That should get you started.

Feb 07 2006

"Kris" <fu bar.com> writes:

http://www-128.ibm.com/developerworks/opensource/library/os-jface1/
http://www-128.ibm.com/developerworks/opensource/library/os-jface2/?ca=dgr-lnxw06SWT-JFace2

http://www-128.ibm.com/developerworks/opensource/library/os-ecgui1/
http://www-128.ibm.com/developerworks/library/os-ecgui2/

http://www.javaworld.com/javaworld/jw-04-2004/jw-0426-swtjface_p.html
http://www.javaworld.com/javaworld/jw-05-2004/jw-0531-swt_p.html

http://www.eclipse.org/articles/Article-SWT-Design-1/SWT-Design-1.html
http://www.eclipse.org/articles/Article-SWT-Color-Model/swt-color-model.htm
http://www.eclipse.org/articles/swt-design-2/swt-design-2.html
http://www.eclipse.org/articles/Article-SWT-graphics/SWT_graphics.html
http://www.eclipse.org/articles/Article-Table-viewer/table_viewer.html
http://www.eclipse.org/articles/Article-Table-viewer/table_viewer.html
http://www.eclipse.org/articles/Article-GEF-Draw2d/GEF-Draw2d.html
http://www.eclipse.org/articles/Article-small-cup-of-swt/pocket-PC.html
http://www.eclipse.org/articles/Article-Image-Viewer/Image_viewer.html
http://www.eclipse.org/articles/treeviewer-cg/TreeViewerArticle.htm
http://www.eclipse.org/articles/StyledText%201/article1.html
http://www.eclipse.org/articles/StyledText%202/article2.html
http://www.eclipse.org/articles/Article-SWT-browser-widget/browser.html
http://www.eclipse.org/articles/Article-SWT-OpenGL/opengl.html
http://www.eclipse.org/articles/Article-SWT-DND/DND-in-SWT.html
http://www.cs.umanitoba.ca/~eclipse/


"pragma" <pragma_member pathlink.com> wrote in message
news:dsab9v$280f$1 digitaldaemon.com...
 Let me be the first (of possibly many) to say: I don't have a clue how to
 program with SWT.

 With that in mind, could anyone steer me toward a solid tutorial on how to
 become familiarized with how SWT is organized?  How about how to do a
 "Hello
 Windows World" application?  Tutorials?  Code comparisons to AWT or other
 GUI
 libs?

 I'd love to start talking shop in this subgroup, but I really need to do
 my
 homework first.

 Thanks,

 - Eric Anderton at yahoo

Feb 07 2006

pragma <pragma_member pathlink.com> writes:

In article <dsas2c$2p3u$1 digitaldaemon.com>, Kris says...
http://www-128.ibm.com/developerworks/opensource/library/os-jface1/
http://www-128.ibm.com/developerworks/opensource/library/os-jface2/?ca=dgr-lnxw06SWT-JFace2

http://www-128.ibm.com/developerworks/opensource/library/os-ecgui1/
http://www-128.ibm.com/developerworks/library/os-ecgui2/

http://www.javaworld.com/javaworld/jw-04-2004/jw-0426-swtjface_p.html
http://www.javaworld.com/javaworld/jw-05-2004/jw-0531-swt_p.html

http://www.eclipse.org/articles/Article-SWT-Design-1/SWT-Design-1.html
http://www.eclipse.org/articles/Article-SWT-Color-Model/swt-color-model.htm
http://www.eclipse.org/articles/swt-design-2/swt-design-2.html
http://www.eclipse.org/articles/Article-SWT-graphics/SWT_graphics.html
http://www.eclipse.org/articles/Article-Table-viewer/table_viewer.html
http://www.eclipse.org/articles/Article-Table-viewer/table_viewer.html
http://www.eclipse.org/articles/Article-GEF-Draw2d/GEF-Draw2d.html
http://www.eclipse.org/articles/Article-small-cup-of-swt/pocket-PC.html
http://www.eclipse.org/articles/Article-Image-Viewer/Image_viewer.html
http://www.eclipse.org/articles/treeviewer-cg/TreeViewerArticle.htm
http://www.eclipse.org/articles/StyledText%201/article1.html
http://www.eclipse.org/articles/StyledText%202/article2.html
http://www.eclipse.org/articles/Article-SWT-browser-widget/browser.html
http://www.eclipse.org/articles/Article-SWT-OpenGL/opengl.html
http://www.eclipse.org/articles/Article-SWT-DND/DND-in-SWT.html
http://www.cs.umanitoba.ca/~eclipse/

Thanks! (Thanks to Deewiant as well)

Now if you need me, I'll be here, digging myself out of this 'linkalanche'. :)

- Eric Anderton at yahoo

Feb 07 2006

Sean Kelly <sean f4.ca> writes:

Kris wrote:
 http://www-128.ibm.com/developerworks/opensource/library/os-jface1/
 http://www-128.ibm.com/developerworks/opensource/library/os-jface2/?ca=dgr-lnxw06SWT-JFace2
 
 http://www-128.ibm.com/developerworks/opensource/library/os-ecgui1/
 http://www-128.ibm.com/developerworks/library/os-ecgui2/
 
 http://www.javaworld.com/javaworld/jw-04-2004/jw-0426-swtjface_p.html
 http://www.javaworld.com/javaworld/jw-05-2004/jw-0531-swt_p.html
 
 http://www.eclipse.org/articles/Article-SWT-Design-1/SWT-Design-1.html
 http://www.eclipse.org/articles/Article-SWT-Color-Model/swt-color-model.htm
 http://www.eclipse.org/articles/swt-design-2/swt-design-2.html
 http://www.eclipse.org/articles/Article-SWT-graphics/SWT_graphics.html
 http://www.eclipse.org/articles/Article-Table-viewer/table_viewer.html
 http://www.eclipse.org/articles/Article-Table-viewer/table_viewer.html
 http://www.eclipse.org/articles/Article-GEF-Draw2d/GEF-Draw2d.html
 http://www.eclipse.org/articles/Article-small-cup-of-swt/pocket-PC.html
 http://www.eclipse.org/articles/Article-Image-Viewer/Image_viewer.html
 http://www.eclipse.org/articles/treeviewer-cg/TreeViewerArticle.htm
 http://www.eclipse.org/articles/StyledText%201/article1.html
 http://www.eclipse.org/articles/StyledText%202/article2.html
 http://www.eclipse.org/articles/Article-SWT-browser-widget/browser.html
 http://www.eclipse.org/articles/Article-SWT-OpenGL/opengl.html
 http://www.eclipse.org/articles/Article-SWT-DND/DND-in-SWT.html
 http://www.cs.umanitoba.ca/~eclipse/

Egads!  When I opened this message my desk actually groaned under the 
weight of all those links.


Sean

Feb 07 2006

"Kris" <fu bar.com> writes:

Forgot this link for widget examples: http://www.eclipse.org/swt/widgets/


"pragma" <pragma_member pathlink.com> wrote in message 
news:dsab9v$280f$1 digitaldaemon.com...
 Let me be the first (of possibly many) to say: I don't have a clue how to
 program with SWT.

 With that in mind, could anyone steer me toward a solid tutorial on how to
 become familiarized with how SWT is organized?  How about how to do a 
 "Hello
 Windows World" application?  Tutorials?  Code comparisons to AWT or other 
 GUI
 libs?

 I'd love to start talking shop in this subgroup, but I really need to do 
 my
 homework first.

 Thanks,

 - Eric Anderton at yahoo

Feb 07 2006

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digitalmars.D.dwt - Ice Breaker